Dastardly Scruples

How to play: There are no winners or losers in this game, it's just a bit of fun to see what morals you have. Each person posts a moral question and another poster has to answer it before posting their own question.

You're walking to work one morning when you viddy someone dropping their wallet on the ground. You pick up their wallet and open it. There's easily over two hundred pounds in it. The person has walked off out of sight by now, but you could easily catch them up if you wanted to. Plus their home address can be found in their wallet. Do you do the decent thing and return it, or is it a case of finders keepers?